Dark Pool Volume Tracker - FINRA ATS & Off-Exchange Data

See how much of a stock trades in dark pools each week, on which venues, and when that volume suddenly jumps.

Data	Official FINRA OTC Transparency data (alternative trading systems and other off-exchange trading)
Price	$5 per 1,000 stock reports, no subscription. Apify's free plan credit covers a first test.
Freshness	Weekly; FINRA publishes Tier 1 stocks two weeks after the week ends, other stocks after four
Try it	The input is pre-filled with a working example: just click Start.

Example output

Ticker	Week of	Dark pool shares	WoW	vs average	Unusual	Top venue
XYZ	2026-09-21	48,200,000	+142%	2.4x	Yes	UBS ATS (21%)
ABC	2026-09-21	3,100,000	-8%	0.9x	No	JPM-X (18%)

Illustrative rows; real runs return the full fields listed under Output.

Dark pools are private venues where institutions trade large blocks without showing their orders on an exchange. FINRA requires every alternative trading system (ATS) and off-exchange dealer to report their volume per stock, and publishes it weekly. This Actor turns that official data into one clean report per stock: how much traded in dark pools, the dollar value, the average trade size, the biggest venues, and whether this week was unusual compared with recent weeks.

What you can do with it

• 🕶️ Spot institutional accumulation: a jump in dark pool volume often means big players are building or unwinding a position quietly.
• 🔎 Market-wide scan: leave tickers empty to get the most traded dark pool stocks of the week.
• 🩳 Pair with short interest: combine with Short Squeeze Radar for a fuller picture of who is trading.
• 🏦 Market structure research: venue market share (UBS, JPM-X, Sigma X and others) per stock.

How to use it

Your watchlist, 8 weeks of history

{ "tickers": ["AAPL", "TSLA", "NVDA", "GME"] }

The 50 stocks with the most dark pool volume this week

{ "topCount": 50 }

Only stocks with unusual dark pool activity (3x their average)

{ "tickers": ["AMC", "GME", "PLTR", "SOFI"], "unusualRatio": 3, "onlyUnusual": true }

Output

{
  "ticker": "XYZ",
  "issueName": "XYZ Corp Common Stock",
  "tier": "NMS Tier 1",
  "weekStartDate": "2026-09-21",
  "atsShares": 48200000,
  "atsTrades": 412000,
  "atsNotionalUsd": 6120000000,
  "avgAtsTradeSize": 117,
  "otcNonAtsShares": 151000000,
  "offExchangeShares": 199200000,
  "atsShareOfOffExchangePct": 24.2,
  "atsChangeWoWPct": 142.1,
  "atsVsAverage": 2.4,
  "unusualAtsVolume": true,
  "topVenues": [{ "mpid": "UBSA", "name": "UBS ATS", "shares": 10100000, "trades": 61000, "sharePct": 21 }],
  "venueCount": 31,
  "history": [{ "weekStartDate": "2026-09-21", "atsShares": 48200000, "atsTrades": 412000, "atsNotionalUsd": 6120000000, "otcShares": 151000000 }]
}

atsShares is dark pool (ATS) volume. otcNonAtsShares is other off-exchange volume, mostly retail orders filled by wholesalers. The SUMMARY record lists the stocks flagged as unusual.

Use it from code or an AI agent

Python

from apify_client import ApifyClient

client = ApifyClient("<YOUR_APIFY_TOKEN>")
run = client.actor("smartmoney-data/dark-pool-volume-tracker").call(run_input={"tickers": ["AAPL", "TSLA", "NVDA", "GME"]})
for item in client.dataset(run["defaultDatasetId"]).iterate_items():
    print(item)

AI agents (Claude, ChatGPT, Cursor and other MCP clients): connect the Apify MCP server with this Actor preloaded:

https://mcp.apify.com/?tools=smartmoney-data/dark-pool-volume-tracker

Add this URL as a remote MCP server or custom connector in your AI client, sign in with Apify (OAuth), then just ask, for example:

Which stocks had unusually high dark pool volume in the latest FINRA week?

Part of the SmartMoney Data suite: Short Squeeze Radar · Institutional Ownership · Insider Trades · Hedge Fund 13F · Smart Money Confluence

Pricing

Pay per result: you're charged for each stock report returned. See the Pricing tab for current rates.

FAQ

Is this real-time dark pool data? No. Real-time dark pool prints come from paid feeds. This is FINRA's official weekly data, published with a two to four week delay, which is free and authoritative.

What is the difference between ATS and OTC volume? ATS volume is trading on registered alternative trading systems (dark pools). OTC non-ATS volume is other off-exchange trading, mostly wholesalers filling retail orders.

Is this legal to use? Yes. FINRA publishes OTC Transparency data for public use.

Support

Found a bug or need a feature? Open an issue on the Issues tab or email smartmoney-data@googlegroups.com.

Data is provided for informational purposes only and is not investment advice.